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view docs/html/sdleventstate.html @ 3880:74e828c64315 SDL-1.2

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Fixed bug #292 I might be on crack here. It looks like SDL_ConvertMono() in src/audio/SDL_audiocvt.c adds the left and right channels of a stereo stream together, and clamps the new mono channel if it would overflow. Shouldn't it be dividing by 2 to average the two sample points instead of clamping? Otherwise the mono sample point's volume doubles in the conversion. This would also make the conversion faster, as it replaces two branches per sample frame with a bitwise shift. --ryan.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 24 Sep 2006 15:45:37 +0000
parents 355632dca928
children
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>SDL_EventState</TITLE
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>SDL_EventState</H1
><DIV
CLASS="REFNAMEDIV"
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><H2
>Name</H2
>SDL_EventState&nbsp;--&nbsp;This function allows you to set the state of processing certain events.</DIV
><DIV
CLASS="REFSYNOPSISDIV"
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><H2
>Synopsis</H2
><DIV
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><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>Uint8 <B
CLASS="FSFUNC"
>SDL_EventState</B
></CODE
>(Uint8 type, int state);</CODE
></P
><P
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><H2
>Description</H2
><P
>This function allows you to set the state of processing certain event <TT
CLASS="PARAMETER"
><I
>type</I
></TT
>'s.</P
><P
>If <TT
CLASS="PARAMETER"
><I
>state</I
></TT
> is set to <TT
CLASS="LITERAL"
>SDL_IGNORE</TT
>, 
that event <TT
CLASS="PARAMETER"
><I
>type</I
></TT
> will be automatically dropped from the event queue and will 
not be filtered.</P
><P
>If <TT
CLASS="PARAMETER"
><I
>state</I
></TT
> is set to <TT
CLASS="LITERAL"
>SDL_ENABLE</TT
>, 
that event <TT
CLASS="PARAMETER"
><I
>type</I
></TT
> will be processed normally.</P
><P
>If <TT
CLASS="PARAMETER"
><I
>state</I
></TT
> is set to <TT
CLASS="LITERAL"
>SDL_QUERY</TT
>,
<TT
CLASS="FUNCTION"
>SDL_EventState</TT
> will return the current processing 
state of the specified event <TT
CLASS="PARAMETER"
><I
>type</I
></TT
>.</P
><P
>A list of event <TT
CLASS="PARAMETER"
><I
>type</I
></TT
>'s can be found in the <A
HREF="sdlevent.html"
><SPAN
CLASS="STRUCTNAME"
>SDL_Event</SPAN
></A
> section.</P
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>SDL_Event</SPAN
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